PMI Structural Foam
Rifeng WH is a closed-cell rigid foam base on Polymethacrylimide (PMI) polymer, that is completely free of CFC’s. It's with Coarse Cell Size. Excellent machinability and surface adhesion, As sandwich structure material, it has good fastness to be combined with skin.
Rifeng WH has been designed for use primarily in aerospace applications. Its outstanding properties make it an ideal material solution for aircraft components, including stringer structures in pressure bulkheads. This structural foam is also suitable for helicopter applications and is frequently used in the main and tail rotor blades, as well as fuselage panels.
Processing and Production
Rifeng WH core makes it possible to produce sandwich components in a single step (co-curing), resulting in reduced overall production time. Rifeng WH can take curing temperatures up to 130 °C and pressures up to 0.7 MPa. After heat treatment, Rifeng WH-HT can even be used at curing temperatures of 180 °C and at pressures of 0.7 MPa.
Rifeng
WH is highly suited to autoclave technologies and vacuum infusion processes, including RTM and VARTM processes.
Weight Saving
When building composite sandwich components, lightweight Rifeng WH has a closed cell structure that ensures the resin stays exactly where you want it – in the interface. This eliminates excess and unnecessary resin that adds undesirable weight to the finished part
Thermoforming and Shaping
Rifeng WH can be easily thermoformed or CNC machined to meet customer requirements. High precision, pre-shaped and ready-to-use foam cores in simple or complex geometries can also be supplied by us.
Mechanical Properties
|
Property
|
Test Method
|
Unit
|
Rifeng 52WH
|
Rifeng 75WH
|
Rifeng 110WH
|
|
Density
|
ISO 845
|
Kg/m3
|
52±12
|
75±15
|
110±20
|
|
Compressive Strength
|
ISO 844
|
MPa
|
0.85
|
1.75
|
3.60
|
|
Tensile Strength
|
ASTM D638
|
MPa
|
1.65
|
2.30
|
3.60
|
|
Elastic Modulus
|
ASTM D638
|
MPa
|
80
|
109
|
186
|
|
Elongation at Break
|
ASTM D638
|
%
|
2.6
|
2.8
|
2.8
|
|
Flexural Strength
|
ASTM D790
|
MPa
|
1.70
|
2.95
|
5.10
|
|
Shear Strength
|
ASTM C273
|
MPa
|
0.80
|
1.35
|
2.45
|
|
Shear Modulus
|
ASTM C273
|
MPa
|
30
|
55
|
85
|
|
Heat distortion resistance
|
DIN 53424
|
℃
|
≧200
|
≧200
|
≧200
|
- Technical data values presented are typical for nominal density, subject to normal manufacturing variations, not applicable for designing and acceptance. Please contact our QA team for material criterion and standard.
- Density values are valid for full-size sheets with a minimum thickness of 10 mm(0.39 inch) only. Other density ranges are available upon request.
Sales range for Rifeng WH
|
Rifeng WH
|
Size (mm)
|
Thickness (mm)
|
|
52 WH
|
2500 x 1250
|
3~110
|
|
75 WH
|
2500 x 1250
|
3~100
|
|
110 WH
|
2160 x 1100
|
3~90
|
- All dimension ranges presented in these tables are standard. To discuss any size or thickness not listed, please contact a Rifeng representative.
- Thickness tolerance ± 0.2 mm, length/ width tolerance ± 2 mm, other tolerances available on request.
